Please see clothed_pokemon and hatted_pokemon. (These tags were discussed on Discord today.)
Is it OK to keep both? Or alternatively, maybe delete hatted_pokemon and just keep clothed_pokemon for all cases, including for Pokémon wearing hats? (post #3843544 is a Rowlet wearing nothing but a hat)
At least in my opinion, I'm leaning towards maybe keeping both tags. I created both tags (clothed_pokemon in 2011 and hatted_pokemon recently). Hats don't seem like typical clothes. This would be related to the way we use nude, in which hats don't count as clothes.
Apparently, people have been using clothed_pokemon when the Pokémon is wearing clothes, but usually that tag is not used when the Pokémon is just wearing a hat. (though that could be fixed either way with tag gardening)